Troubleshooting

The three-phase input switch of the SACU is not powered on.

1. The power supply to the upstream transformer station of the three-phase input switch is abnormal.
2. The three-phase input switch is faulty.

1. Use a multimeter to check whether the power supply to the upstream transformer station of the three-phase input switch is normal.
2. Replace the three-phase input switch.

The input switch (QF01 or QF02) of the PID module is not powered on.

1. The input switch of the PID module is faulty.
2. The cable between the three-phase input switch and the input switch of the PID module is loose or disconnected.

1. Replace the input switch of the PID module.
2. Check the cable between the three-phase input switch and the input switch of the PID module. If the cable is loose or disconnected, secure it.

The PID module of the SACU is not powered on.

1. The grid three-phase input ports for the PID module are disconnected from cables or loosely connected to cables.
2. The power grid is disconnected from power.
3. The PID module is faulty.

1. If the cable is loose or disconnected, secure it.
2. Check whether power is available to the power grid.
3. Contact the dealer or Huawei technical support.

The single-phase input switch of the SACU is not powered on.

1. The power supply to the upstream transformer station of the single-phase input switch is abnormal.
2. The single-phase input switch is faulty.

1. Use a multimeter to check whether the power supply to the upstream transformer station of the single-phase input switch is normal.
2. Replace the single-phase input switch.

The PoE module is not powered on.

The power cable of the PoE module is loose or disconnected.

If the cable is loose or disconnected, secure it.

The power adapter or 24 V DC power module fails to supply power.

1. The input and output power cables of the 24 V DC power module are loose or disconnected.
2. The power adapter or 24 V DC power module is faulty.

1. If the cable is loose or disconnected, secure it.
2. Replace the power adapter or 24 V DC power module.

The SmartLogger in the SACU is not powered on.

1. The DC output power cable for the power adapter does not connect to the 12V IN port on the SmartLogger.
2. The power cable is not connected to the AC power receiving port on the power adapter.
3. The AC input power cable is not connected to the AC socket.
4. The power adapter is faulty.
5. The SmartLogger is faulty.

1. Check the power adapter and connect the DC output power cable for the power adapter to the 12V IN port on the SmartLogger.
2. Check whether the power cable is connected to the AC power receiving port on the power adapter.
3. Check whether the power cable is connected to the AC socket.
4. Replace the power adapter.
5. Contact the dealer or Huawei technical support.

No communication between the SmartLogger and the Ethernet switch.

1. The network cable between the SmartLogger and the Ethernet switch is not properly connected.
2. The IP address of the SmartLogger is not configured or is not in the LAN.

1. Check whether the network port indicators on the SmartLogger and Ethernet switch blink properly. If not, connect the network cable to another FE port on the Ethernet switch or replace the network cable and try again.
2. On the SUN2000 app, check whether the IP address of the SmartLogger is correctly set. If not, set the IP address again.
3. Log in to the SmartLogger WebUI over the LAN port (default IP address of the LAN port: 192.168.8.10) and check whether the IP address of the SmartLogger is correct. If not, set the IP address again.
4. Connect the PC to the Ethernet switch and ping the IP address of the SmartLogger. If the communication is abnormal, replace the network cable and try again.

No communication between the SmartLogger and the SmartModule.

1. The network cable between the SmartLogger and the SmartModule is not properly connected.
2. The communication certificate has expired.

1. Check whether the network port indicators on the SmartLogger and SmartModule blink properly. If not, connect the network cable to another GE port on the SmartModule or replace the network cable and try again.
2. Log in to the SmartLogger WebUI or SUN2000 app and check whether a communication certificate expiration alarm is generated. If yes, reload the certificate.
3. Contact the dealer or Huawei technical support.